Burglar-alarm.



Patented Sept. 20, 1910.'

Gummy:

WILLIAM H. COOK, OF STURGIS, MICHIGAN.

BURGLAR-ALARM.

Specification of Letters Patent.

Patented Sept. 20, 1910.

Application filed September 9, 1909. Serial No. 516,902.

To all whom it may concern:

.l 3e it known that I, WVJLLIAM I-I. Coon, a citlzen of the UnitedStates, residing at Sturg1s, county of St. Joseph, State of Michigan,have invented certain new and useful Improvements in Burglar-Alarms, ofwhich the following is a specification.

This invention relates to improvements in burglar alarms.

The main objects of this invention are, first, to provide an improveddetonating burglar alarm adapted to be attached to a door or window.Second, to provide an improved burglar alarm which can be readilyadjusted from its operative to its inoperative positlon, or vice versa.Third, to provide an improved burglar alarm which is very simple instructure and manipulation and not likely to get out of repair in use.Fourth, to provide an improved burglar alarm which is simple in itsparts and the parts are readily assembled.

Further objects, etc., in which:

Figure 1 is a plan View of my improved burglar alarm, the same beingshown in operative position on a door. Fig. 2 is a detail side elevationof the structure appearing in Fig. 1, the same being shown in itsactuated position by dotted lines. Fig. 3 is an end elevation lookingfrom the bottom of Figs. 1 and 2. Fig. 4 is an enlarged detail sectiontaken on a line corresponding to line 4-4 of Fig. 1 looking in thedirection of the little arrows at the end of the section lines, thetrigger being shown in its inoperative positions by dotted lines.

In the drawing similar reference numerals refer to similar partsthroughout the several views.

Referring to the drawing,'1 represents a door casing and 2 a door, thedoor and door casing being shown herein in conventional form.

The base plate 3 is adapted to be mounted upon the door casing asillustrated, or upon the meeting rail of an upper window sash whenapplied to a window so that the device is operated by the opening of thedoor, or by the raising of the lower or lowering of the upper windowsash.

The base plate is preferably secured by means of screws 4 asillustrated. On this base plate is an outwardly projecting trigger post5 which is notched at 6 and 7 to receive the cartridge holder carryingarm 8. The arm 8 is provided with a cylindrical holder 9 at its outerend for the cartridge 10. This arm is preferably carried by the coiled s)ring 11 which is secured to the base plate. no end of the spring 11 ispreferably extended to form the cartridge holder arm 8, the end beingcoiled to form the holder 9 and extended laterally to form the fingerpiece 12, the other end of the spring is preferably extended into thespring supporting arm 13 which is arranged through an upwardlyprojecting support 1 1 on the base and secured by the clamping fingers15. The end of the arm 13 is preferably turned laterally at 16 tosupport the frame in an upright position. On the base is an upwardlyprojecting anvil 17 against which the head of the cartridge is struckwhen the trigger releases the cartridge holder arm. The base plate,trigger post, anvil, spring supports and spring clamping fingers arepreferably formed integrally of plate metal as illustrated as this canbe readily done and the parts formed very economically.

The anvil is preferably inclined as illustrated and made of considerablelength the cartridge is sure to strike properly in firing the same.

The trigger 18 is pivoted upon the trigger post at 19. This trigger isprovided with a notch 20 adapted to engage the cartridge holding arm 8.When the cartridge holding arm is engaged in the notch (3 it supportsthe trigger in operative position. WVhen it is engaged in the notch 7 itholds the trigger in its inoperative position as shown by dotted linesin Fig. 4. By the manipulation of the trigger the parts can be adjustedto their operative or inoperative position so that the device is veryconvenient in its manipulation.

\Vhile the particular form of my invention illustrated is a verydesirable embodiment thereof, I am aware that it is capable ofconsiderable variation in structural details without departing from myinvention, and I desire to be understood as claiming my improvements,not only in the specific form illustrated, but broadly as well withinthe scope of the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In a burglar alarm, the combination with a base plate; an anvil onsaid base plate; a cartridge holder; a swinging arm by which saidcartridge holder is carried;

a coiled supporting spring for said arm; a l trigger being notched toengage said car supporting arm for said spring having a laterally turnedend, one end of said spring being extended to form said cartridge holderarm and coiled to form said cartridge holder and the other end beingextended to form said spring supporting arm; a support on said basethrough which said spring supporting arm is arranged; clamping fingerson said base for said spring supporting arm; a trigger post adapted toreceive and retain said cartridge holder arm in its set position; and atrigger pivoted on said post to engage said cartridge holder arm.

2. In a burglar alarm, the combination with a. base plate; an anvil onsaid base plate; a cartridge holder; a swinging arm by which saidcartridge holder is carried; a coiled supporting spring for said cartridge holder arm; a supporting arm for said spring, one end of saidspring being extended to form said cartridge holder arm and the otherend being extended to form said spring supporting arm; clamping fingerson said base for said spring supporting arm; a trigger post adapted toreceive said cartridge holder arm and retain it in its set position; anda trigger pivoted on said post to engage said cartridge holder arm.

3. In a burglar alarm, the combination with a base plate; an anvil onsaid base plate; a cartridge holder; a swinging arm by which saidcartridge holder is carried; a coiled supporting spring for said arm; asupporting arm for said spring, one end of said spring being extended toform said swinging arm and the other end being extended to form saidspring supporting arm; a trigger post adapted to receive and retain saidcartridge holder arm in its set position and a trigger pivoted on saidpost to engage said cartridge holder arm when set and'to release it fromsaid post when actuated.

4. In a burglar alarm, the combination with a base plate; a trigger posthaving a pair of notches therein; an anvil; a cartridge holder; acartridge holder arm adapted to be engaged in said notches in said post;a spring for said cartridge holder arm; and a trigger. pivoted on saidpost, said tridge holder arm, said cartridge holder arm being adaptedwhen engaged in one notch to hold said trigger in its inoperativeposition and when engaged in the other notch to support said trigger inits operative position, said trigger being adapted to be manipulated toshift said arm from one notch to the other.

5. In a burglar alarm, the combination with a base plate; a trigger posthaving a pair of notches thereon; an anvil; a cartridge holder; acartridge holder arm adapted to be engaged in said notches in said post;a spring for said cartridge holder arm; and a trigger pivoted on saidpost, said trigger being notched to engage said cartridge holder arm,said cartridge holder arm being adapted when engaged in one notch tohold said trigger in its inoperative position and when engaged in theother notch to support said trigger in its operative position.

6. In a bur lar alarm, the combination with a base plate, of an inclinedanvil on said base plate; a cartridge holder; an arm by which saidcartridge holder is carried;

a spring for said cartridge holder arm; a

trigger post having a notch therein adapted to receive said cartridgeholder arm and retain it in its set position; and a trigger pivoted onsaid post, said trigger being notched to engage said cartridge holderarm, and adapted, when actuated, to disengage it from said post.

7. In a burglar alarm, the combination with a base plate; an anvil onsaid base plate; a cartridge holder; a swinging arm by which saidcartridge holder is carried;

a spring for said cartridge holder arm; a trigger post having a notchtherein adapted to receive said arm and retain it in its set position;and a tigger pivoted on said post to engage said cartridge holder armand lift it from said notch when actuated.

In witness whereof, I have hereunto setmy hand and seal in the presenceof two witnesses.

"WILLIAM H. COOK. [1,. s] Vitnesses IVALTER STAGE, WVAL'roN HYDE.

